canvas: Kill optimizers' ->ptr field.

13 files changed, 91 insertions, 83 deletions

diff --git a/libdimension/canvas.c b/libdimension/canvas.c
index b605108..2aade47 100644
--- a/libdimension/canvas.c
+++ b/libdimension/canvas.c
@@ -25,50 +25,37 @@
 
 #include "dimension-internal.h"
 
-/// cleanup_fn for canvases.
-static void dmnsn_canvas_cleanup(void *ptr);
-
 dmnsn_canvas *
 dmnsn_new_canvas(dmnsn_pool *pool, size_t width, size_t height)
 {
-  dmnsn_canvas *canvas = DMNSN_PALLOC_TIDY(pool, dmnsn_canvas, dmnsn_canvas_cleanup);
+  dmnsn_canvas *canvas = DMNSN_PALLOC(pool, dmnsn_canvas);
   canvas->width = width;
   canvas->height = height;
-  canvas->optimizers = DMNSN_NEW_ARRAY(dmnsn_canvas_optimizer);
+  canvas->optimizers = DMNSN_PALLOC_ARRAY(pool, dmnsn_canvas_optimizer *);
   canvas->pixels = dmnsn_palloc(pool, sizeof(dmnsn_tcolor)*width*height);
   return canvas;
 }
 
 void
-dmnsn_canvas_cleanup(void *ptr)
+dmnsn_init_canvas_optimizer(dmnsn_canvas_optimizer *optimizer)
 {
-  dmnsn_canvas *canvas = ptr;
-
-  // Free the optimizers
-  DMNSN_ARRAY_FOREACH (dmnsn_canvas_optimizer *, i, canvas->optimizers) {
-    if (i->free_fn) {
-      i->free_fn(i->ptr);
-    }
-  }
-  dmnsn_delete_array(canvas->optimizers);
+  optimizer->optimizer_fn = NULL;
 }
 
 // Set a canvas optimizer
 void
-dmnsn_canvas_optimize(dmnsn_canvas *canvas,
-                      const dmnsn_canvas_optimizer *optimizer)
+dmnsn_canvas_optimize(dmnsn_canvas *canvas, const dmnsn_canvas_optimizer *optimizer)
 {
-  dmnsn_array_push(canvas->optimizers, optimizer);
+  dmnsn_array_push(canvas->optimizers, &optimizer);
 }
 
 // Find an optimizer if it's already installed
 dmnsn_canvas_optimizer *
-dmnsn_canvas_find_optimizer(const dmnsn_canvas *canvas,
-                            dmnsn_canvas_optimizer_fn *optimizer_fn)
+dmnsn_canvas_find_optimizer(const dmnsn_canvas *canvas, dmnsn_canvas_optimizer_fn *optimizer_fn)
 {
-  DMNSN_ARRAY_FOREACH (dmnsn_canvas_optimizer *, i, canvas->optimizers) {
-    if (i->optimizer_fn == optimizer_fn) {
-      return i;
+  DMNSN_ARRAY_FOREACH (dmnsn_canvas_optimizer **, i, canvas->optimizers) {
+    if ((*i)->optimizer_fn == optimizer_fn) {
+      return *i;
     }
   }
 
@@ -88,8 +75,8 @@ dmnsn_canvas_set_pixel(dmnsn_canvas *canvas, size_t x, size_t y,
   canvas->pixels[y*canvas->width + x] = tcolor;
 
   // Call the optimizers
-  DMNSN_ARRAY_FOREACH (dmnsn_canvas_optimizer *, i, canvas->optimizers) {
-    i->optimizer_fn(canvas, i->ptr, x, y);
+  DMNSN_ARRAY_FOREACH (dmnsn_canvas_optimizer **, i, canvas->optimizers) {
+    (*i)->optimizer_fn(*i, canvas, x, y);
   }
 }
 
diff --git a/libdimension/dimension/canvas.h b/libdimension/dimension/canvas.h
index d03a37e..e325364 100644
--- a/libdimension/dimension/canvas.h
+++ b/libdimension/dimension/canvas.h
@@ -41,23 +41,22 @@ typedef struct dmnsn_canvas {
   dmnsn_tcolor *pixels;
 } dmnsn_canvas;
 
+/* Forward-declare dmnsn_canvas_optimizer. */
+typedef struct dmnsn_canvas_optimizer dmnsn_canvas_optimizer;
+
 /**
  * Canvas optimizer callback type.
+ * @param[in] optimizer  The canvas optimizer.
  * @param[in] canvas  The canvas that was just updated.
- * @param[in] ptr     The canvas optimizer's data pointer.
- * @param[in] x       The x-coordinate that was just updated.
- * @param[in] y       The y-coordinate that was just updated.
+ * @param[in] x  The x-coordinate that was just updated.
+ * @param[in] y  The y-coordinate that was just updated.
  */
-typedef void dmnsn_canvas_optimizer_fn(const dmnsn_canvas *canvas, void *ptr,
-                                       size_t x, size_t y);
+typedef void dmnsn_canvas_optimizer_fn(dmnsn_canvas_optimizer *optimizer, const dmnsn_canvas *canvas, size_t x, size_t y);
 
 /** Canvas optimizer. */
-typedef struct dmnsn_canvas_optimizer {
+struct dmnsn_canvas_optimizer {
   dmnsn_canvas_optimizer_fn *optimizer_fn; /**< Optimizer callback. */
-  dmnsn_free_fn             *free_fn;      /**< Destructor callback. */
-
-  void *ptr; /**< Generic pointer. */
-} dmnsn_canvas_optimizer;
+};
 
 /**
  * Allocate a new canvas.
@@ -69,6 +68,12 @@ typedef struct dmnsn_canvas_optimizer {
 dmnsn_canvas *dmnsn_new_canvas(dmnsn_pool *pool, size_t width, size_t height);
 
 /**
+ * Initialize a dmnsn_canvas_optimizer field
+ * @param[in] optimizer  The optimizer to initialize.
+ */
+void dmnsn_init_canvas_optimizer(dmnsn_canvas_optimizer *optimizer);
+
+/**
  * Set a canvas optimizer
  * @param[in,out] canvas    The canvas to optimize.
  * @param[in]     optimizer The optimizer to use.
diff --git a/libdimension/dimension/gl.h b/libdimension/dimension/gl.h
index 8e64ba6..284a248 100644
--- a/libdimension/dimension/gl.h
+++ b/libdimension/dimension/gl.h
@@ -25,10 +25,11 @@
 
 /**
  * Optimize a canvas for GL drawing
+ * @param[in] pool  The memory pool to allocate from.
  * @param[in,out] canvas  The canvas to optimize.
  * @return Whether the canvas was successfully optimized.
  */
-int dmnsn_gl_optimize_canvas(dmnsn_canvas *canvas);
+int dmnsn_gl_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas);
 
 /**
  * Write canvas to GL framebuffer.
diff --git a/libdimension/dimension/png.h b/libdimension/dimension/png.h
index c45a9bf..f4d2c1e 100644
--- a/libdimension/dimension/png.h
+++ b/libdimension/dimension/png.h
@@ -27,10 +27,11 @@
 
 /**
  * Optimize a canvas for PNG exporting
+ * @param[in] pool  The memory pool to allocate from.
  * @param[in,out] canvas  The canvas to optimize.
  * @return Whether the canvas was successfully optimized.
  */
-int dmnsn_png_optimize_canvas(dmnsn_canvas *canvas);
+int dmnsn_png_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas);
 
 /**
  * Write a canvas to a file in PNG format.
diff --git a/libdimension/gl-stubs.c b/libdimension/gl-stubs.c
index ca17056..df31308 100644
--- a/libdimension/gl-stubs.c
+++ b/libdimension/gl-stubs.c
@@ -27,7 +27,7 @@
 #include <errno.h>
 
 int
-dmnsn_gl_optimize_canvas(dmnsn_canvas *canvas)
+dmnsn_gl_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas)
 {
   errno = ENOSYS;
   return -1;
diff --git a/libdimension/gl.c b/libdimension/gl.c
index 2800484..dd707a9 100644
--- a/libdimension/gl.c
+++ b/libdimension/gl.c
@@ -30,9 +30,9 @@
 
 // Optimize canvas for GL drawing
 int
-dmnsn_gl_optimize_canvas(dmnsn_canvas *canvas)
+dmnsn_gl_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas)
 {
-  dmnsn_rgba8_optimize_canvas(canvas);
+  dmnsn_rgba8_optimize_canvas(pool, canvas);
   return 0;
 }
 
@@ -44,10 +44,9 @@ dmnsn_gl_write_canvas(const dmnsn_canvas *canvas)
   size_t height = canvas->height;
 
   // Check if we can optimize this
-  dmnsn_canvas_optimizer *optimizer =
-    dmnsn_canvas_find_optimizer(canvas, dmnsn_rgba8_optimizer_fn);
-  if (optimizer) {
-    glDrawPixels(width, height, GL_RGBA, GL_UNSIGNED_BYTE, optimizer->ptr);
+  dmnsn_rgba8_optimizer *rgba8 = (dmnsn_rgba8_optimizer *)dmnsn_canvas_find_optimizer(canvas, dmnsn_rgba8_optimizer_fn);
+  if (rgba8) {
+    glDrawPixels(width, height, GL_RGBA, GL_UNSIGNED_BYTE, rgba8->data);
     return glGetError() == GL_NO_ERROR ? 0 : 1;
   }
 
diff --git a/libdimension/png-stubs.c b/libdimension/png-stubs.c
index d68b543..9c752a5 100644
--- a/libdimension/png-stubs.c
+++ b/libdimension/png-stubs.c
@@ -27,7 +27,7 @@
 #include <errno.h>
 
 int
-dmnsn_png_optimize_canvas(dmnsn_canvas *canvas)
+dmnsn_png_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas)
 {
   errno = ENOSYS;
   return -1;
diff --git a/libdimension/png.c b/libdimension/png.c
index 24f8afa..faca080 100644
--- a/libdimension/png.c
+++ b/libdimension/png.c
@@ -31,9 +31,9 @@
 #include <stdint.h>
 
 int
-dmnsn_png_optimize_canvas(dmnsn_canvas *canvas)
+dmnsn_png_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas)
 {
-  dmnsn_rgba16_optimize_canvas(canvas);
+  dmnsn_rgba16_optimize_canvas(pool, canvas);
   return 0;
 }
 
@@ -171,12 +171,11 @@ dmnsn_png_write_canvas_thread(void *ptr)
   }
 
   // Check if we can optimize this
-  dmnsn_canvas_optimizer *optimizer =
-    dmnsn_canvas_find_optimizer(payload->canvas, dmnsn_rgba16_optimizer_fn);
-  if (optimizer) {
+  dmnsn_rgba16_optimizer *rgba16 = (dmnsn_rgba16_optimizer *)dmnsn_canvas_find_optimizer(payload->canvas, dmnsn_rgba16_optimizer_fn);
+  if (rgba16) {
     for (size_t y = 0; y < height; ++y) {
       // Invert the rows.  PNG coordinates are fourth quadrant.
-      uint16_t *row_opt = (uint16_t *)optimizer->ptr + 4*(height - y - 1)*width;
+      uint16_t *row_opt = rgba16->data + 4*(height - y - 1)*width;
       png_write_row(png_ptr, (png_bytep)row_opt);
       dmnsn_future_increment(payload->future);
     }
diff --git a/libdimension/rgba.c b/libdimension/rgba.c
index 6df124e..367927f 100644
--- a/libdimension/rgba.c
+++ b/libdimension/rgba.c
@@ -1,5 +1,5 @@
 /*************************************************************************
- * Copyright (C) 2010-2011 Tavian Barnes <tavianator@tavianator.com>     *
+ * Copyright (C) 2010-2014 Tavian Barnes <tavianator@tavianator.com>     *
  *                                                                       *
  * This file is part of The Dimension Library.                           *
  *                                                                       *
@@ -27,40 +27,45 @@
 #include <stdint.h>
 
 void
-dmnsn_rgba8_optimize_canvas(dmnsn_canvas *canvas)
+dmnsn_rgba8_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas)
 {
   if (dmnsn_canvas_find_optimizer(canvas, dmnsn_rgba8_optimizer_fn)) {
     return;
   }
 
-  dmnsn_canvas_optimizer optimizer;
-  optimizer.optimizer_fn = dmnsn_rgba8_optimizer_fn;
-  optimizer.free_fn = dmnsn_free;
-  optimizer.ptr = dmnsn_malloc(4*canvas->width*canvas->height*sizeof(uint8_t));
+  size_t ndata = 4*canvas->width*canvas->height;
+  dmnsn_rgba8_optimizer *rgba8 = dmnsn_palloc(pool, sizeof(dmnsn_rgba8_optimizer) + ndata*sizeof(uint8_t));
 
-  dmnsn_canvas_optimize(canvas, &optimizer);
+  dmnsn_canvas_optimizer *optimizer = &rgba8->optimizer;
+  dmnsn_init_canvas_optimizer(optimizer);
+  optimizer->optimizer_fn = dmnsn_rgba8_optimizer_fn;
+
+  dmnsn_canvas_optimize(canvas, optimizer);
 }
 
 void
-dmnsn_rgba16_optimize_canvas(dmnsn_canvas *canvas)
+dmnsn_rgba16_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas)
 {
   if (dmnsn_canvas_find_optimizer(canvas, dmnsn_rgba16_optimizer_fn)) {
     return;
   }
 
-  dmnsn_canvas_optimizer optimizer;
-  optimizer.optimizer_fn = dmnsn_rgba16_optimizer_fn;
-  optimizer.free_fn = dmnsn_free;
-  optimizer.ptr = dmnsn_malloc(4*canvas->width*canvas->height*sizeof(uint16_t));
+  size_t ndata = 4*canvas->width*canvas->height;
+  dmnsn_rgba16_optimizer *rgba16 = dmnsn_palloc(pool, sizeof(dmnsn_rgba16_optimizer) + ndata*sizeof(uint16_t));
+
+  dmnsn_canvas_optimizer *optimizer = &rgba16->optimizer;
+  dmnsn_init_canvas_optimizer(optimizer);
+  optimizer->optimizer_fn = dmnsn_rgba16_optimizer_fn;
 
-  dmnsn_canvas_optimize(canvas, &optimizer);
+  dmnsn_canvas_optimize(canvas, optimizer);
 }
 
 void
-dmnsn_rgba8_optimizer_fn(const dmnsn_canvas *canvas, void *ptr,
-                         size_t x, size_t y)
+dmnsn_rgba8_optimizer_fn(dmnsn_canvas_optimizer *optimizer, const dmnsn_canvas *canvas, size_t x, size_t y)
 {
-  uint8_t *pixel = (uint8_t *)ptr + 4*(y*canvas->width + x);
+  dmnsn_rgba8_optimizer *rgba8 = (dmnsn_rgba8_optimizer *)optimizer;
+
+  uint8_t *pixel = rgba8->data + 4*(y*canvas->width + x);
   dmnsn_tcolor tcolor = dmnsn_canvas_get_pixel(canvas, x, y);
   tcolor = dmnsn_tcolor_remove_filter(tcolor);
   tcolor.c = dmnsn_color_to_sRGB(tcolor.c);
@@ -73,10 +78,11 @@ dmnsn_rgba8_optimizer_fn(const dmnsn_canvas *canvas, void *ptr,
 }
 
 void
-dmnsn_rgba16_optimizer_fn(const dmnsn_canvas *canvas, void *ptr,
-                          size_t x, size_t y)
+dmnsn_rgba16_optimizer_fn(dmnsn_canvas_optimizer *optimizer, const dmnsn_canvas *canvas, size_t x, size_t y)
 {
-  uint16_t *pixel = (uint16_t *)ptr + 4*(y*canvas->width + x);
+  dmnsn_rgba16_optimizer *rgba16 = (dmnsn_rgba16_optimizer *)optimizer;
+
+  uint16_t *pixel = rgba16->data + 4*(y*canvas->width + x);
   dmnsn_tcolor tcolor = dmnsn_canvas_get_pixel(canvas, x, y);
   tcolor = dmnsn_tcolor_remove_filter(tcolor);
   tcolor.c = dmnsn_color_to_sRGB(tcolor.c);
diff --git a/libdimension/rgba.h b/libdimension/rgba.h
index a67caf2..b43ca3f 100644
--- a/libdimension/rgba.h
+++ b/libdimension/rgba.h
@@ -1,5 +1,5 @@
 /*************************************************************************
- * Copyright (C) 2010-2011 Tavian Barnes <tavianator@tavianator.com>     *
+ * Copyright (C) 2010-2014 Tavian Barnes <tavianator@tavianator.com>     *
  *                                                                       *
  * This file is part of The Dimension Library.                           *
  *                                                                       *
@@ -23,16 +23,26 @@
  * RGBA canvas optimizer interface, used by image optimizers.
  */
 
+#include <stdint.h>
+
+/// RGBA8 optimizer type.
+typedef struct dmnsn_rgba8_optimizer {
+  dmnsn_canvas_optimizer optimizer;
+  uint8_t data[];
+} dmnsn_rgba8_optimizer;
+
+/// RGBA16 optimizer type.
+typedef struct dmnsn_rgba16_optimizer {
+  dmnsn_canvas_optimizer optimizer;
+  uint16_t data[];
+} dmnsn_rgba16_optimizer;
+
 /// Apply the RGBA8 optimizer to a canvas.
-DMNSN_INTERNAL void dmnsn_rgba8_optimize_canvas(dmnsn_canvas *canvas);
+DMNSN_INTERNAL void dmnsn_rgba8_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas);
 /// Apply the RGBA16 optimizer to a canvas.
-DMNSN_INTERNAL void dmnsn_rgba16_optimize_canvas(dmnsn_canvas *canvas);
+DMNSN_INTERNAL void dmnsn_rgba16_optimize_canvas(dmnsn_pool *pool, dmnsn_canvas *canvas);
 
 /// RGBA8 optimizer callback.
-DMNSN_INTERNAL void dmnsn_rgba8_optimizer_fn(const dmnsn_canvas *canvas,
-                                             void *ptr,
-                                             size_t x, size_t y);
+DMNSN_INTERNAL void dmnsn_rgba8_optimizer_fn(dmnsn_canvas_optimizer *optimizer, const dmnsn_canvas *canvas, size_t x, size_t y);
 /// RGBA16 optimizer callback.
-DMNSN_INTERNAL void dmnsn_rgba16_optimizer_fn(const dmnsn_canvas *canvas,
-                                              void *ptr,
-                                              size_t x, size_t y);
+DMNSN_INTERNAL void dmnsn_rgba16_optimizer_fn(dmnsn_canvas_optimizer *optimizer, const dmnsn_canvas *canvas, size_t x, size_t y);
diff --git a/libdimension/tests/gl.c b/libdimension/tests/gl.c
index 262fecf..1546d6c 100644
--- a/libdimension/tests/gl.c
+++ b/libdimension/tests/gl.c
@@ -56,7 +56,7 @@ main(void)
    */
 
   // Optimize the canvas for GL drawing
-  if (dmnsn_gl_optimize_canvas(canvas) != 0) {
+  if (dmnsn_gl_optimize_canvas(pool, canvas) != 0) {
     dmnsn_delete_pool(pool);
     fprintf(stderr, "--- Couldn't optimize canvas for GL! ---\n");
     return EXIT_FAILURE;
diff --git a/libdimension/tests/png.c b/libdimension/tests/png.c
index 1feff72..7311e43 100644
--- a/libdimension/tests/png.c
+++ b/libdimension/tests/png.c
@@ -34,7 +34,7 @@ main(void)
   dmnsn_canvas *canvas = dmnsn_new_canvas(pool, 768, 480);
 
   // Optimize the canvas for PNG export
-  if (dmnsn_png_optimize_canvas(canvas) != 0) {
+  if (dmnsn_png_optimize_canvas(pool, canvas) != 0) {
     fprintf(stderr, "--- Couldn't optimize canvas for PNG! ---\n");
     ret = EXIT_FAILURE;
     goto exit;
diff --git a/libdimension/tests/render.c b/libdimension/tests/render.c
index 866df2d..56a80d3 100644
--- a/libdimension/tests/render.c
+++ b/libdimension/tests/render.c
@@ -316,7 +316,7 @@ main(void)
   // Optimize the canvas for PNG export
   bool have_png = true;
   errno = 0;
-  if (dmnsn_png_optimize_canvas(scene->canvas) != 0) {
+  if (dmnsn_png_optimize_canvas(pool, scene->canvas) != 0) {
     if (errno == ENOSYS) {
       have_png = false;
     } else {
@@ -328,7 +328,7 @@ main(void)
   // Optimize the canvas for GL drawing
   bool have_gl = true;
   errno = 0;
-  if (dmnsn_gl_optimize_canvas(scene->canvas) != 0) {
+  if (dmnsn_gl_optimize_canvas(pool, scene->canvas) != 0) {
     if (errno == ENOSYS) {
       have_gl = false;
     } else {