Add lookup texture support. :D yay.

Makefile

@@ -108,6 +108,12 @@ ifeq ($(HAVE_FREETYPE), 1)
    DEFINES += $(FREETYPE_CFLAGS)
 endif
 
+ifeq ($(HAVE_IMLIB), 1)
+   OBJ += gfx/image.o
+   LIBS += $(IMLIB_LIBS)
+   DEFINES += $(IMLIB_CFLAGS)
+endif
+
 ifeq ($(HAVE_FFMPEG), 1)
    OBJ += record/ffemu.o
    LIBS += $(AVCODEC_LIBS) $(AVCORE_LIBS) $(AVFORMAT_LIBS) $(AVUTIL_LIBS) $(SWSCALE_LIBS)

gfx/image.c

@@ -0,0 +1,53 @@
+/*  SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
+ *  Copyright (C) 2010-2011 - Hans-Kristian Arntzen
+ *
+ *  Some code herein may be based on code found in BSNES.
+ * 
+ *  SSNES is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with SSNES.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "image.h"
+#include <Imlib2.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+
+// Imlib2 <3<3<3<3
+bool texture_image_load(const char *path, struct texture_image *out_img)
+{
+   Imlib_Image img;
+   img = imlib_load_image(path);
+   if (!img)
+      return false;
+
+   imlib_context_set_image(img);
+
+   out_img->width = imlib_image_get_width();
+   out_img->height = imlib_image_get_height();
+
+   size_t size = out_img->width * out_img->height * sizeof(uint32_t);
+   out_img->pixels = malloc(size);
+   if (!out_img->pixels)
+   {
+      imlib_free_image();
+      return false;
+   }
+
+   const uint32_t *read = imlib_image_get_data_for_reading_only();
+   // Convert ARGB -> RGBA.
+   for (unsigned i = 0; i < size / sizeof(uint32_t); i++)
+      out_img->pixels[i] = (read[i] >> 24) | (read[i] << 8);
+
+   imlib_free_image();
+   return true;
+}

gfx/image.h

@@ -0,0 +1,34 @@
+/*  SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
+ *  Copyright (C) 2010-2011 - Hans-Kristian Arntzen
+ *
+ *  Some code herein may be based on code found in BSNES.
+ * 
+ *  SSNES is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with SSNES.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __SSNES_IMAGE_H
+#define __SSNES_IMAGE_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+struct texture_image
+{
+   unsigned width;
+   unsigned height;
+   uint32_t *pixels;
+};
+
+bool texture_image_load(const char *path, struct texture_image* img);
+
+
+#endif

gfx/shader_glsl.c

@@ -19,6 +19,11 @@
 #include <string.h>
 #include "general.h"
 #include "shader_glsl.h"
+#include "strl.h"
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 
 #ifdef __APPLE__
 #include <OpenGL/gl.h>
@@ -38,6 +43,11 @@
 
 #include "gl_common.h"
 
+#ifdef HAVE_IMLIB
+#include "image.h"
+#endif
+
+
 #ifdef __APPLE__
 #define pglCreateProgram glCreateProgram
 #define pglUseProgram glUseProgram
@@ -81,6 +91,7 @@ static PFNGLGETATTACHEDSHADERSPROC pglGetAttachedShaders = NULL;
 #endif
 
 #define MAX_PROGRAMS 16
+#define MAX_TEXTURES 4
 
 enum filter_type
 {
@@ -96,6 +107,10 @@ static struct gl_fbo_scale gl_scale[MAX_PROGRAMS];
 static unsigned gl_num_programs = 0;
 static unsigned active_index = 0;
 
+static GLuint gl_teximage[MAX_TEXTURES];
+static unsigned gl_teximage_cnt = 0;
+static char gl_teximage_uniforms[MAX_TEXTURES][64];
+
 struct shader_program
 {
    char *vertex;
@@ -273,6 +288,86 @@ static bool get_xml_attrs(struct shader_program *prog, xmlNodePtr ptr)
    return true;
 }
 
+#ifdef HAVE_IMLIB
+static bool get_texture_image(const char *shader_path, xmlNodePtr ptr)
+{
+   bool linear = true;
+   xmlChar *filename = xmlGetProp(ptr, (const xmlChar*)"file");
+   xmlChar *filter = xmlGetProp(ptr, (const xmlChar*)"filter");
+   xmlChar *id = xmlGetProp(ptr, (const xmlChar*)"id");
+
+   if (!id)
+   {
+      SSNES_ERR("Could not find ID in texture.\n");
+      goto error;
+   }
+
+   if (!filename)
+   {
+      SSNES_ERR("Could not find filename in texture.\n");
+      goto error;
+   }
+
+   if (filter && strcmp((const char*)filter, "nearest") == 0)
+      linear = false;
+
+   char tex_path[256];
+   strlcpy(tex_path, shader_path, sizeof(tex_path));
+
+   char *last = strrchr(tex_path, '/');
+   if (!last) last = strrchr(tex_path, '\\');
+   if (last) last[1] = '\0';
+
+   strlcat(tex_path, (const char*)filename, sizeof(tex_path));
+
+   struct texture_image img;
+   SSNES_LOG("Loading texture image from: \"%s\" ...\n", tex_path);
+   if (!texture_image_load(tex_path, &img))
+   {
+      SSNES_ERR("Failed to load texture image from: \"%s\"\n", tex_path);
+      goto error;
+   }
+
+   strlcpy(gl_teximage_uniforms[gl_teximage_cnt], (const char*)id, sizeof(gl_teximage_uniforms[0]));
+
+   glGenTextures(1, &gl_teximage[gl_teximage_cnt]);
+   glActiveTexture(GL_TEXTURE0 + gl_teximage_cnt + 1);
+   glBindTexture(GL_TEXTURE_2D, gl_teximage[gl_teximage_cnt]);
+
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, linear ? GL_LINEAR : GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, linear ? GL_LINEAR : GL_NEAREST);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+   glPixelStorei(GL_UNPACK_ROW_LENGTH, img.width);
+   glTexImage2D(GL_TEXTURE_2D,
+         0, GL_RGBA, img.width, img.height, 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, img.pixels);
+
+   glActiveTexture(GL_TEXTURE0);
+   glBindTexture(GL_TEXTURE_2D, 0);
+   free(img.pixels);
+
+   xmlFree(filename);
+   xmlFree(id);
+   if (filter)
+      xmlFree(filter);
+
+   gl_teximage_cnt++;
+
+   return true;
+
+error:
+   if (filename)
+      xmlFree(filename);
+   if (filter)
+      xmlFree(filter);
+   if (filter)
+      xmlFree(id);
+   return false;
+}
+#endif
+
 static unsigned get_xml_shaders(const char *path, struct shader_program *prog, size_t size)
 {
    LIBXML_TEST_VERSION;
@@ -354,6 +449,16 @@ static unsigned get_xml_shaders(const char *path, struct shader_program *prog, s
          }
          num++;
       }
+#ifdef HAVE_IMLIB
+      else if (strcmp((const char*)cur->name, "texture") == 0)
+      {
+         if (!get_texture_image(path, cur))
+         {
+            SSNES_ERR("Texture image failed to load.\n");
+            goto error;
+         }
+      }
+#endif
    }
 
    if (num == 0)
@@ -587,6 +692,10 @@ void gl_glsl_deinit(void)
 
          pglDeleteProgram(gl_program[i]);
       }
+
+      glDeleteTextures(gl_teximage_cnt, gl_teximage);
+      gl_teximage_cnt = 0;
+      memset(gl_teximage_uniforms, 0, sizeof(gl_teximage_uniforms));
    }
 
    memset(gl_program, 0, sizeof(gl_program));
@@ -617,6 +726,12 @@ void gl_glsl_set_params(unsigned width, unsigned height,
 
       location = pglGetUniformLocation(gl_program[active_index], "rubyFrameCount");
       pglUniform1i(location, frame_count);
+
+      for (unsigned i = 0; i < gl_teximage_cnt; i++)
+      {
+         location = pglGetUniformLocation(gl_program[active_index], gl_teximage_uniforms[i]);
+         pglUniform1i(location, i + 1);
+      }
    }
 }
 

qb/config.libs.sh

@@ -43,6 +43,7 @@ check_critical SDL "Cannot find SDL library."
 
 check_lib CG -lCg cgCreateContext
 check_pkgconf XML libxml-2.0
+check_pkgconf IMLIB imlib2
 
 if [ $HAVE_FFMPEG != no ]; then
    check_pkgconf AVCODEC libavcodec
@@ -64,7 +65,7 @@ check_lib XVIDEO -lXv XvShmCreateImage
 check_lib STRL -lc strlcpy
 
 # Creates config.mk and config.h.
-VARS="ALSA OSS AL RSOUND ROAR JACK PULSE SDL DYLIB CG XML DYNAMIC FFMPEG AVCODEC AVFORMAT AVCORE AVUTIL SWSCALE SRC CONFIGFILE FREETYPE XVIDEO NETPLAY FBO STRL"
+VARS="ALSA OSS AL RSOUND ROAR JACK PULSE SDL DYLIB CG XML IMLIB DYNAMIC FFMPEG AVCODEC AVFORMAT AVCORE AVUTIL SWSCALE SRC CONFIGFILE FREETYPE XVIDEO NETPLAY FBO STRL"
 create_config_make config.mk $VARS
 create_config_header config.h $VARS
 

qb/config.params.sh

@@ -26,3 +26,4 @@ add_command_line_enable JACK "Enable JACK support" auto
 add_command_line_enable PULSE "Enable PulseAudio support" auto
 add_command_line_enable FREETYPE "Enable FreeType support" auto
 add_command_line_enable XVIDEO "Enable XVideo support" auto
+add_command_line_enable IMLIB "Enable imlib2 support" auto